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? ?inch 22, 193. F. J. STRAUB 2,111,170] BLOCK MAKING APPARATUS Filed Aug. 19, 1936 3 Sheets-Sheet i L?VVENTOR. F. .Im 5 T R A U 8 2,111,701 _BLOCK MAKING APPARATUS Filed Aug. 19, 1936 3 Sheets-Sheet 2 7/? QM ) BY _ \ ATTORNEY ' ch 22, 1938. ' ,_-_ _,_ STRAUB ? BLOCK MAKING APPARATUS Filed Augp 19, 1956 40 "' M, 39 _ 5L __ I l fjיי 1 21mm - 3 Sheets-Sheet 3 Patented Mar. 22, 1938 f ?* n H . 2,111,701 ?PATENT OFFICE? S 2,111,701 BLOCK MAKING APPARATUS Francis J?. Straub, New Kensington, Pa. Application August 19, 1936, Serial No. 96,850 (01. 25-941) 11 Claims. ing the mold box provided with a pair of oppo site disks providing the smoothing side walls of the mold, in lowered position; Fig. 6 is a partly vertical section on the line My invention relates to the art of making con crete building blocks, and particularly to means for imparting surface treatment thereto while the aggregate is still plastic. r5 7 In the manufacture of such blocks, made of a VI?,?VI of Fig.5; . plate in place of compressing tampers; , . Fig. 8 is aplan view, partly in section, on the desirable in some cases to secure a smooth or ap proximately smooth outer surface. lineVIII--VIII of Fig. 9, showing a modi?ed con In my prior ,that, extent has proven generally satisfactory in Fig. 10 is a similar view showing the formed 15 block ejected from the mold horizontally; surface segregation of the? ?ner particles of the mix. ' > In connection with the manufacture and use of such blocks, it has long been desirable to pro vide a block with at least one side so surfaced for exposurein a wall. . A further desirable result is in producing lines of direction, whether very indicated; ?Fig.1l is a sectional detail view of the tipping frame of said ?gures, tilted for removal of the block. For the formationof the block of any desired rectangular shape?and dimensions, I utilize a 20 more or less conventional housing box comprising a bottom wall or plate 2, end walls 3, and as in Figs. 1 and 2, a side wall 4, the opposite ?side of the ,mold box omitting such wall and being closed minute or more prominent, in a curving direction by the smoothing or trowelling disk 5. as to the block when in location, for surface j The block to be formed may be solid, or cored as in Fig. 3, in which case the cores 6 are secured ornamentation. , ? That is to say, in a smoothing or trowelling treatment of a block face in plastic form, while 730 an approximately smooth surface is possible, it is also true that minute grooves or'lines of di rection are developed co-extensive with the orig inal direction of movement of the smoothing face '40 Fig. 9 is a longitudinal vertical section on the lineIX-IX of Fig. v8, with the hopper and tamps plied trowelling or smoothing is involved, with a degree of accompanying densi?cation and?local 33 - disclosed means and the method of so treating one or more sides of a block. Such treatment to sofar as horizontal or vertical reciprocably ap '20 10 struction providing for lower face smoothing; Patents Nos. 1,651,420, 1,682,359, 1,692,355 and 1,987,721, and in application Ser. No. 60,073, are r Fig. '7 is a longitudinal vertical section through a mold box showing application of a pressing suitable aggregate such as sand and gravel,,cin? ders, etc. mixed with cement and water and sub jected to tamping or pressing operations, it is r 5 to and move vertically with the bottom plate 2. Aggregate is ?delivered to the mold box in the usual manner by a hopper ?I slidable on platform W O 8 and is compressed by tampers 9 following estab lished conventional practice, or by other suitable compressing means. ? one or more faces of a block while in the tamping In ?lling and tamping position the mold box is temporarily supported in erected position by any suitable meansas an adjustable bar or plate II]. Guide rods ll extend from a base ?I2, through the mold box for maintaining it in position during mold, during the tamping or pressing? operation, vertical adjustment. and ?nal ejection, so as to accomplish the de from the base through the bottom wall 2 for ejection of the block when the mold box is low or faces. After considerable experiment I have now de vised a machine which is capable of functioning in the desired manner to simultaneously smooth sired results and product, such machine forming the subject matter of this application. In connection with the further description ref 145 erence will be made to the accompanying draw- , ings showing preferred forms of apparatus which may be employed, in'which: _ Similar rods 13 I extend ered, and rods 13 are surrounded by ?springs M for re-erecting the mold box for the next opera tion. 7 i - ' > 45 In the machine as disclosed I show the rotat abledisk 5 carried by its shaft 15 in bearing l6 of a swinging lever ?arm 11 pivoted on a shaft l8 forming machine and a smoothing disk applied and having an extension arm 19 provided with Fig. 1 is a plan view of the mold of a block , to and forming one side of the mold; - Fig. 2 is a view in side elevation thereof, ?partly in section on the line II-?I,I of Fig. 1; Fig. 3 is an isometric view of the resulting block; ? , ~ ' Figs. 4 and 5 are views like Figs. 1 and 2, show a counterweight 2U. 50 The bottom plate of the mold box is connected at 2| with a link or links 22 having a terminal pin 23 adapted to be engaged by hook 24 of lever arm extension 25 upon lowering the disk 5, as in :dotted lines Fig. 2. r 55 2 2,111,701 Lever arm I?! and the rotatable disk 5 are main drawings. stop, as abutment 26. inwardly of the wall of mold box 3b and a sep Disk 5 is adapted to lie closely against the open side of the mold forming a retaining wall there for, and to be rotated by suitable gearing as pulleys or sprockets 21, 28, a driving gear 29 and connected chains, as will be readily understood. 10 I show in Figs. 4, 5 and 6 a similar construction? utilizing a pair of disks 50. arranged at opposite sides of the mold box 3a and forming a pair of rotating side walls therefor. Otherwise the con struction and operation is the same as above de 15 scribed, the disks being located at each side of bearing I6, with corresponding indicating nu merals. I show also in Fig. 5 one means for tilt ing the disk lever H as by a ?exible connection 30 secured to lever extension l9 as at 3| passing 20 over sheaves 32, 32, and provided with a depend ing pull terminal 33, whereby the disk or disks may be lowered out of operative relation to the face or faces of the molded block. Such lowering of the disk or disks effects a con 25 tinuous wiping and smoothing action on the face arable opposite wall or pallet 33b is removable with the molded block from plate 2b, when the formed block and pallet are projected laterally from the mold, as in Fig. 10. During compres sion the pallet plate forms one wall of the mold box and is retained by any suitable means, as 10 locking hooks c. For the purpose of thus removing the block I provide any suitable construction as a series of rods or bars l3b connected with pusher plate 21) and a rear cross bar framing 36 having a suit 36 on a rear trackway 38 of the foundation. By such means the discharge of the block may be effected by the operator. 20 Rods 42 also extend forwardly from bar 36 through suitable bearings in the ends of the mold box and abut against pallet 34b, maintain~ ing it in proper spaced relation. At a suitable position beyond the mold box is 25 formed and faced block in elevated position as pallet 34?) into position for removal, the angle placement of the next pallet and a new charge of aggregate, with corresponding erection of the 35 disk or disks, for another operation. In such treatment the compressed aggregate 15 able operating handle or frame 31. Such manip ulating mechanism is slidably mounted as by bar provided a tilting angle shaped bracket 39 pivoted at 40 to suitable supports for outward tilting the block ejecting rods I3 with its usual pallet 34, whereupon the mold box is then erected for whereby to reverse the block with its plate or bracket resting temporarily on a suitable abut 30 ment support Ill. In such position it will be understood that the plate 2b and the cores have been withdrawn. In such installation, disk 51) is preferably lo cated approximately centrally underneath the 35 mold box, as indicated, and provides a substan in molded form is smoothed on one or both sides tial support during the tamping or pressing treat by the disk or disks, providing the trowelled surface or surfaces and with the annularly de ment. As the block is formed the disk 5b is in rotation and imparts the smoothing or trowelling treatment to the contacting face of the block, 40 such treatment continuing during the ejection, and leaving the surface of the block in the de 40 veloped minute score marks over the side face or faces, as indicated in Fig. 3. It will be under stood of course that the compression of the ag gregate may be effected by a presser plate or head 35 as in Fig. 7, extending slightly into the upper 45 edge portion of the mold box as commonly prac ticed. In either case the density of the formed block necessarily depends on the applied force, but with either such application the aggregate is desirably substantially uniform throughout from top to bottom. The smoothing action of the disk is preferably by its peripheral portion as indicated in the principal ?gures of the drawings, and its wiping action tends to not only smooth 55 and trowel the surface but to additionally impel, segregate and distribute the ?ner particles of the mix not only over the ?entire surface but at the side and end edge portions of the block, leav 60 Pusher plate 25 in operative position is located or faces, passing therebeyond and in conformity with the lowering of the mold box by engage ment of hook 24 with terminal 23, leaving the 30 shown. Thereafter the block is removed from 50 be ?rst placed in the box, as indicated in the tained in normally operative position as in Fig. 2 by the counterweight and any suitable limiting sired condition with a somewhat different minute curving line effect depending on the proportions of the disk, speed of rotation, surface ?nish, etc. 45 If desired, the face of the block may be treated by any suitable coloring material, as in my prior Patent No. 1,692,355. The construction and mode of operation of the machine will be readily understood and appre 50 ciated by all those familiar with the block mak ing art and it provides means for securing the desirable effects of not only consistency of prod uct but also the desirable smooth and ornamental ?nish to the block face or faces. 55 The invention is especially novel and useful in providing means for a wiping and trowelling treatment across the face of the block in a con ing a de?nite ?nished corner or corners. sistently curving path. In Figs. 8 to 11 I show a modi?ed construction in which the mold box 32) rests by its open side on the face of a horizontally arranged disk 5b What I claim is: 60 1. In combination with an open top mold box adapted to receive plastic aggregate and com mounted by its downwardly extending spindle l5b pressing means therefor operable through the in a suitable bearing lBb forming a portion of 65 the foundation framework of the machine. In such construction the cores 61) extend horizon tally through the mold box cavity through a carrying and pushing 'plate 25, whereby the top, one of the face forming walls of the box being omitted, a rotatable facing disk forming 65 the closing wall therefor, means maintaining closing and compression resistance between the mold box and disk during compression, and formed block may be separated from the cores means effecting separation between the mold 70 and projected laterally from the mold box. The aggregate is delivered by hopper ?lb and tamps 9b box and contents and the disk, said means em bodying a connection between the mold box and compress the aggregate transversely between the cores, the operation otherwise being substantial disk. ly the same as in usual practice. If desired, a preliminary facing charge of-?n'er material may 2. In combination with an open top mold box adapted to receive plastic aggregate and com pressing means therefor operable through the 76 3 2,111,701 open top, one of the face forming walls of the box being omitted, a rotatable facing disk form ing the closing wall therefor when the ?lled box is in a position subject to compression, means for rotating the disk while in con?ning relation to the block in formation, and means effecting separability between the mold box and its con tents and the disk upon completion of densi?ca tion of the aggregate, said means embodying a 10 connection between the mold box and disk. 3. In combination with an open top mold box adapted to receive plastic aggregate and com pressing means therefor through the open top, one of the face forming walls- of the box being 15 omitted, a rotatable facing disk forming the clos ing wall therefor, means for rotating, the disk, while in con?ning relation to the block in for mation, and means for effecting edgewise sepa ation of the mold box .and disk. 20 4. In combination with an open top mold box having an open side, a rotatable facing disk pro viding a closing wall at the open side, a verti-v cally movable frame therefor, means associated therewith for rotating the disk, and means co 25 operating with the movable frame for lowering and raising the mold box. ' 5. In combination with an open top mold box having a bottom and an open side and a depend ing lowering device, a rotatable facing disk form 30 ing a'closure for the open side, a vertically mov able frame therefor having a portion engageable with the lowering device, means for rotating the disk, and means for erecting the mold box after lowering it. 35 6. In combination with an open top mold box ' having opposite open sides, a pair of rotatable smoothing disks forming closures therefor hav ing operative connection with the mold box and a movable frame therefor adapted to move the 40 disks across the faces of the block in formation, and means associated therewith for rotating the disks together. , 7. In combination with an open top mold box having a bottom and an open side and a depend 45 ing lowering device, a rotatable facing disk form ing a closure for the open side, a vertically mov able lever arm therefor having a hook terminal engageable with the lowering device, a counter weighted arm, means for rotating the disk mounted on the lever arm, a lifting element con nected with the counterweighted arm, and means for erecting the mold box after lowering it. 8. In combination with an open top and bot tom mold box having a rear wall, and a hori zontally arranged rotatable smoothing disk clos ing the open bottom thereof, an inner pusher plate and an outer closing pallet wall forming con?ning faces for the block in formation, a tip 1O ping support therefor, and pusher rods extend ing through the rear wall and connected with the inner pusher plate. 9. In combination with an open top and bot tom mold box having a rear wall,? and a hori zontally arranged rotatable smoothing disk clos ing the open bottom thereof, an inner pusher plate and an outer closing pallet wall forming con?ning faces for the block in formation, pusher rods extending through the rear wall and con 20 nected with the inner pusher plate, guide rods extending through? opposite ends of the mold box and abutting the pallet wall, and holding latches for the pallet. 10. In combination with an open top and bot tom mold box having a rear wall, and a hori zontally arranged rotatable smoothing disk clos ing the open bottom thereof, an inner pusher . plate and an outer closing pallet wall forming con?ning faces for the block in formation, pusher .?: rods extending through the rear Wall and con nected with the inner pusher plate, and a tilting receiving bracket for the formed block beyond the mold box. _ 11. In combination, a horizontal smoothing disk having a supporting bearing and rotating means, an open bottom and top mold box on the disk having a rear wall and end walls and an open front, a closing pallet for the open front, ?lling and compressing means for the mold box, 40 a rear trackway, block discharging? means mount ed on the trackway and extending through the rear wall of the mold box, and a pivoted angle shaped receiving bracket in front of and ?ush with the surface of the disk and a support there 45 for when tipped with the block for removal on the pallet, . FRANCIS J. STRAUB.